Product Folder Sample & Buy Technical Documents Support & Community Tools & Software TPA3136D2 SLOS938B – MAY 2016 – REVISED JUNE 2016 TPA3136D2 10-W Inductor Free Stereo (BTL) Class-D Audio Amplifier with Ultra Low EMI 1 Features 3 Description • The TPA3136D2 device is an efficient, Class-D audio power amplifier for driving bridged-tied stereo speakers at up to 10 W, 6 Ω, or 8 Ω (per channel). 1 • • • • • • • • • • • 2 × 10 W/ch into 6-Ω Loads at 10% THD+N from a 12-V Supply 2 × 10 W/ch into 8-Ω Loads at 10% THD+N from a 13-V Supply Up to 90% Efficient Class-D Operation (8 Ω) Eliminates Need for Heat Sinks <0.05% THD+N at 1 W/4 Ω/1 kHz Wide Supply Voltage Range Allows Operation from 4.5 V to 14.4 V Inductor-Free Operation Enhanced EMI Performance with Spread Spectrum SpeakerGuard™ Speaker Protection Includes Power Limiter and DC Protection Robust Pin-to-Pin, Pin-to-Ground, and Pin-toPower Short Circuit Protection and Thermal Protection 26-dB Fixed Gain Single-Ended or Differential Analog Inputs Click and Pop Free Startup Advanced EMI Suppression Technology with Spread Spectrum Control scheme enables the use of inexpensive ferrite bead filters at the outputs while meeting EMC requirements for system cost reduction. The TPA3136D2 device is not only fully protected against shorts and overload, the SpeakerGuard™ speaker protection circuitry includes a power limiter and a DC detection circuit for protection of the connected speakers. The DC detect and Pin-to-Pin, Pin-to-Ground, and Pin-to-Power Short Circuit protection circuit protect the speakers from output DC and pin shorts caused in production. The outputs are also fully protected against shorts to GND, PVCC, and output-to-output. The short-circuit protection and thermal protection includes an auto recovery feature. The TPA3136D2 device can drive stereo speakers with as low as 4-Ω impedance. The high efficiency of the TPA3136D2, 90% with an 8-Ω load, eliminates the need for an external heat sink, and TPA3136D2 will be able to output full power on a 2-layer PCB. Device Information(1) 2 Applications • • • • • PART NUMBER Televisions Bluetooth/Wireless Speakers Mini Speakers USB Speakers Consumer Audio Equipment TPA3136D2 PACKAGE HTSSOP (28) BODY SIZE (NOM) 9.70 mm × 4.40 mm (1) For all available packages, see the orderable addendum at the end of the datasheet. Simplified Schematic TPA3136D2 RIGHT Audio Source And Control Ferrite Bead Filter TAS5630 Ferrite Bead Filter LEFT SD FAULT PBTL Mode Select Power Limiter Threshold Select PBTL SELECT Power Supply 4.5V-14.4V PLIMIT 110VAC->240VAC 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. TPA3136D2 SLOS938B – MAY 2016 – REVISED JUNE 2016 www.ti.com Table of Contents 1 2 3 4 5 6 7 8 9 Features .................................................................. Applications ........................................................... Description ............................................................. Revision History..................................................... Device Comparison Table..................................... Pin Configuration and Functions ......................... Specifications......................................................... 1 1 1 2 3 3 5 7.1 7.2 7.3 7.4 7.5 7.6 7.7 5 5 6 6 6 7 7 Absolute Maximum Ratings ...................................... ESD Ratings ............................................................ Recommended Operating Conditions....................... Thermal Information .................................................. Electrical Characteristics........................................... Switching Characteristics .......................................... Typical Characteristics .............................................. Parameter Measurement Information ................ 10 Detailed Description ............................................ 11 9.1 Overview ................................................................. 11 9.2 Functional Block Diagram ....................................... 12 9.3 Feature Description................................................. 12 9.4 Device Functional Modes........................................ 15 10 Application and Implementation........................ 16 10.1 Application Information.......................................... 16 10.2 Typical Applications ............................................. 16 11 Power Supply Recommendations ..................... 23 11.1 Power Supply Decoupling, CS ............................. 23 12 Layout................................................................... 24 12.1 Layout Guidelines ................................................. 24 12.2 Layout Example .................................................... 25 13 Device and Documentation Support ................. 26 13.1 13.2 13.3 13.4 13.5 13.6 Device Support .................................................... Documentation Support ....................................... Community Resources.......................................... Trademarks ........................................................... Electrostatic Discharge Caution ............................ Glossary ................................................................ 26 26 26 26 26 26 14 Mechanical, Packaging, and Orderable Information ........................................................... 27 4 Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Revision A (June 2016) to Revision B Page • Updated Thermal Characteristics .......................................................................................................................................... 6 • Fixed Output Power characteristic to match initial description .............................................................................................. 7 • Fixed duplicate graph issue ................................................................................................................................................... 7 Changes from Original (May 2016) to Revision A • 2 Page Changed data sheet from Product Preview to Production Data ............................................................................................ 3 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated Product Folder Links: TPA3136D2 TPA3136D2 www.ti.com SLOS938B – MAY 2016 – REVISED JUNE 2016 5 Device Comparison Table DEVICE NAME DESCRIPTION TPA3110D2 15-W Filter-Free Class-D Stereo Amplifier with SpeakerGuard™ TPA3140D2 10-W Inductor-Free Class-D Stereo Amplifier with Ultra Low EMI and AGL 6 Pin Configuration and Functions PWP Package 28-Pin HTSSOP (Top View) /SD /FAULT LINP LINN NC NC AVCC GND GVDD PLIMIT RINN RINP NC PBTL 1 2 3 4 5 6 7 Thermal Pad 8 9 10 11 12 13 14 28 27 26 PVCC 25 24 23 22 21 20 OUTPL 19 18 17 16 15 GND PVCC BSPL GND OUTNL BSNL BSNR OUTNR OUTPR BSPR PVCC PVCC Pin Functions PIN NAME NUMBER I/O/P (1) DESCRIPTION SD 1 I Shutdown logic input for audio amp (LOW = outputs Hi-Z, HIGH = outputs enabled). TTL logic levels with compliance to AVCC. FAULT 2 O Open drain output used to display short circuit or dc detect fault status. Voltage compliant to AVCC. Short circuit faults can be set to auto-recovery by connecting FAULT pin to SD pin. Otherwise, both short circuit faults and dc detect faults must be reset by cycling PVCC. LINP 3 I Positive audio input for left channel. Biased at 3 V. LINN 4 I Negative audio input for left channel. Biased at 3 V. 5, 6, 13 I No Connect Pin. Can be shorted to PVCC or shorted to GND or left open. AVCC 7 P Analog supply GND 8 P Analog signal ground. GVDD 9 O High-side FET gate drive supply. Nominal voltage is 7 V. PLIMIT 10 I Power Limiter Control pin RINN 11 I Negative audio input for right channel. Biased at 3 V. RINP 12 I Positive audio input for right channel. Biased at 3 V. NC (1) I = Input, O = Output, P = Power Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated Product Folder Links: TPA3136D2 3 TPA3136D2 SLOS938B – MAY 2016 – REVISED JUNE 2016 www.ti.com Pin Functions (continued) PIN I/O/P (1) DESCRIPTION NAME NUMBER PBTL 14 I Parallel BTL mode select pin. L=Stereo BTL mode, H=Mono PBTL mode PVCC 15, 16 P Power supply for right channel H-bridge. Right channel and left channel power supply inputs are connected internally. BSPR 17 I Bootstrap I/O for right channel, positive high-side FET. OUTPR 18 O Class-D H-bridge positive output for right channel. GND 19 P Power ground for the H-bridges. OUTNR 20 O Class-D H-bridge negative output for right channel. BSNR 21 I Bootstrap I/O for right channel, negative high-side FET. BSNL 22 I Bootstrap I/O for left channel, negative high-side FET. OUTNL 23 O Class-D H-bridge negative output for left channel. GND 24 P Power ground for the H-bridges. OUTPL 25 O Class-D H-bridge positive output for left channel. BSPL 26 I Bootstrap I/O for left channel, positive high-side FET. PVCC 27, 28 P Power supply for left channel H-bridge. Right channel and left channel power supply inputs are connected internally. P Connect to GND for best thermal and electrical performance Thermal Pad 4 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated Product Folder Links: TPA3136D2 TPA3136D2 www.ti.com SLOS938B – MAY 2016 – REVISED JUNE 2016 7 Specifications 7.1 Absolute Maximum Ratings over operating free-air temperature range (unless otherwise noted) (1) Supply voltage AVCC to GND, PVCC to GND Input current To any pin except supply pins MIN MAX UNIT –0.3 16 V 10 mA –0.3 AVCC + 0.3 V 10 V/ms 6.3 V Voltage SD, FAULT to GND (2) Voltage RINN, RINP, LINN, LINP –0.3 BTL, PVCC > 12 V 4.8 BTL, PVCC ≤ 12 V 3.2 PBTL, PVCC > 12 V 2.5 Minimum load resistance, RL PBTL, PVCC ≤ 12 V Ω 1.8 Continuous total power dissipation See the Thermal Information Table Operating free-air temperature range, TA (3) –40 85 °C Temperature range –65 150 °C Storage temperature range, Tstg –65 150 °C (1) (2) (3) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. The voltage slew rate of these pins must be restricted to no more than 10 V/ms. For higher slew rates, use a 100 kΩ resister in series with the pins. The TPA3136D2 incorporates an exposed thermal pad on the underside of the chip. This acts as a heatsink, and it must be connected to a thermally dissipating plane for proper power dissipation. Failure to do so may result in the device going into thermal protection shutdown. See TI Technical Briefs SLMA002 for more information about using the TSSOP thermal pad. 7.2 ESD Ratings VALUE V(ESD) (1) (2) Electrostatic discharge Human body model (HBM), per ANSI/ESDA/JEDEC JS-001 (1) UNIT ±1000 Charged device model (CDM), per JEDEC specification JESD22-C101 (2) ±250 V JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process. JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process. Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated Product Folder Links: TPA3136D2 5 TPA3136D2 SLOS938B – MAY 2016 – REVISED JUNE 2016 www.ti.com 7.3 Recommended Operating Conditions over operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS MIN MAX UNIT 4.5 14.4 V 2 AVCC V VCC Supply voltage PVCC, AVCC VIH High-level input voltage SD, PBTL VIL Low-level input voltage SD, PBTL 0.8 V VOL Low-level output voltage FAULT, RPULL-UP=100 k, PVCC=14.4 V 0.8 V IIH High-level input current SD, PBTL, VI = 2 V, AVCC = 12 V 50 µA IIL Low-level input current SD, PBTL, VI = 0.8 V, AVCC = 12 V 5 µA TA Operating free-air temperature (1) –40 85 °C -40 150 °C TJ (1) Operating junction temperature (1) The TPA3136D2 incorporates an exposed thermal pad on the underside of the chip. This acts as a heatsink, and it must be connected to a thermally dissipating plane for proper power dissipation. Failure to do so may result in the device going into thermal protection shutdown. See TI Technical Briefs SLMA002 for more information about using the TSSOP thermal pad. 7.4 Thermal Information TPA3136D2 THERMAL METRIC (1) PWP (HTSSOP) UNIT 28 PINS RθJA Junction-to-ambient thermal resistance 30.3 °C/W RθJC(top) Junction-to-case (top) thermal resistance 33.5 °C/W RθJB Junction-to-board thermal resistance 17.5 °C/W ψJT Junction-to-top characterization parameter 0.9 °C/W ψJB Junction-to-board characterization parameter 7.2 °C/W RθJC(bot) Junction-to-case (bottom) thermal resistance 0.9 °C/W (1) For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953. 7.5 Electrical Characteristics over operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT DC CHARACTERISTICS, TA = 25°C, AVCC = PVCC = 12 V, RL = 6 Ω, using the TPA3136D2 EVM which is available at ti.com. (unless otherwise noted) | VOS | Class-D output offset voltage (measured differentially) ICC VI = 0 V, Gain = 26 dB 1.5 15 mV Quiescent supply current SD = 2 V, no load, 300 ohm Ferrite Bead + 1nF Output Filter 35 40 mA ICC(SD) Quiescent supply current in shutdown mode SD = 0.8 V, no load 40 60 µA rDS(on) Drain-source on-state resistance IO = 500 mA, TJ = 25°C High Side Excluding Metal and Low side Bond Wire Resistance G Gain ton Turn-on time SD = 2 V tOFF Turn-off time SD = 0.8 V GVDD Gate drive supply IGVDD = 2 mA DC detect time VRINN = 3.1 V and VRINN = 2.9 V, or VRINN = 2.9 V and VRINN = 3.1 V tDCDET 6 240 25 Submit Documentation Feedback mΩ 240 26 27 14 2.5 6.4 6.9 950 dB ms µs 7.4 V ms Copyright © 2016, Texas Instruments Incorporated Product Folder Links: TPA3136D2 TPA3136D2 www.ti.com SLOS938B – MAY 2016 – REVISED JUNE 2016 Electrical Characteristics (continued) over operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT AC CHARACTERISTICS, TA = 25°C, AVCC = PVCC = 12 V, RL = 6 Ω, using the TPA3136D2 EVM which is available at ti.com. (unless otherwise noted) PSRR Power supply ripple rejection 200-mVPP ripple at 1 kHz, Gain = 26 dB, Inputs ac-coupled to GND PO Continuous output power PO Continuous output power PO –65 dB THD+N = 10%, f = 1 kHz 10 W THD+N = 10%, f = 1 kHz, PVCC = 13 V, RL = 8 Ω 10 W Continuous output power, PBTL (mono) THD+N = 10%, f = 1 kHz, PVCC = 13 V, RL = 4 Ω 20 W THD+N Total harmonic distortion + noise f = 1 kHz, PO = 5 W (half-power) Vn Output integrated noise 20 Hz to 22 kHz, A-weighted filter, Gain = 26 dB Crosstalk SNR Signal-to-noise ratio OTE Thermal trip point 0.06% 91 µV –81 dBV VO = 1 Vrms, Gain = 26 dB, f = 1 kHz –75 dB Maximum output at THD+N < 1%, f = 1 kHz, Gain = 26 dB, A-weighted 102 dB 150 °C 15 °C Thermal hysteresis 7.6 Switching Characteristics over operating free-air temperature range (unless otherwise noted) PARAMETER fOSC, SS Oscillator frequency, Spread Spectrum ON MIN NOM MAX UNIT 255 315 355 kHz 7.7 Typical Characteristics All Measurements taken at 26dB closed loop gain, 1-kHz audio, T A= 25°C unless otherwise noted. Measurements were made with AES17 filter using the TPA3136D2 EVM, which is available at ti.com. 10 10 1W 2.5W 5W 1W 2.5W 5W 1 THD + N (%) THD + N (%) 1 0.1 0.01 0.001 20 0.1 0.01 50 100 200 500 1k 2k Frequency (Hz) 5k 10k 20k 0.001 20 D001 AVCC=PVCC = 12 V, Load = 6 Ω + 47 µH, 1 W, 2.5 W, 5 W Figure 1. Total Harmonic Distortion vs Frequency (BTL) 50 100 200 500 1k 2k Frequency (Hz) 5k 10k 20k D002 AVCC=PVCC = 13 V, Load = 8 Ω + 66 µH, 1 W, 2.5 W, 5 W Figure 2. Total Harmonic Distortion vs Frequency (BTL) Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated Product Folder Links: TPA3136D2 7 TPA3136D2 SLOS938B – MAY 2016 – REVISED JUNE 2016 www.ti.com Typical Characteristics (continued) All Measurements taken at 26dB closed loop gain, 1-kHz audio, T A= 25°C unless otherwise noted. Measurements were made with AES17 filter using the TPA3136D2 EVM, which is available at ti.com. 10 10 20 Hz 1 kHz 20 Hz 1 kHz THD + N (%) THD + N (%) 1 0.1 0.01 10m 20m 50m 100m200m 500m 1 Output Power (W) 2 5 10 0.1 0.01 10m 20m 20 D003 AVCC=PVCC = 12 V, Load = 6 Ω + 47 µH, 20 Hz, 1 kHz 18 14 Power @ 10% THD + N (W) 16 16 14 12 10 8 6 4 0 10 20 D004 12 10 8 6 4 0 4 5 6 7 8 9 10 11 Supply Voltage (V) 12 13 14 15 4 300 100 32 240 90 28 180 80 24 120 20 60 16 0 12 -60 8 -120 20 4 Gain -180 Phase -240 10k 20k 10 200 500 1k Frequency 2k 7 5k 8 9 10 11 Supply Voltage (V) 12 13 14 15 D006 Figure 6. Output Power vs Supply Voltage (BTL) 36 100 6 AVCC=PVCC = 4.5 V to 14.4 V, Load = 8 Ω + 66 µH Figure 5. Output Power vs Supply Voltage (BTL) 50 5 D005 AVCC=PVCC = 4.5 V to 14.4 V, Load = 6 Ω + 47 µH Efficiency (%) 70 Phase (o) Gain (dB) 5 2 2 60 50 40 30 PVcc = 6V PVcc = 12V PVcc = 14.4V 0 0 2.5 D007 AVCC=PVCC = 12 V, Load = 6 Ω + 47 µH (device pins) Figure 7. Gain/Phase vs Frequency (BTL) 8 2 Figure 4. Total Harmonic Distortion + Noise vs Output Power (BTL) 20 0 20 50m 100m200m 500m 1 Output Power (W) AVCC=PVCC = 13 V, Load = 8 Ω + 66 µH, 20 Hz, 1 kHz Figure 3. Total Harmonic Distortion + Noise vs Output Power (BTL) Power @ 10% THD + N (W) 1 5 7.5 10 12.5 15 17.5 Total Output Power (W) 20 22.5 25 D008 AVCC=PVCC = 6 V, 12 V, 14.4 V, Load = 6 Ω + 47 µH Figure 8. Efficiency vs Output Power (BTL) Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated Product Folder Links: TPA3136D2 TPA3136D2 www.ti.com SLOS938B – MAY 2016 – REVISED JUNE 2016 Typical Characteristics (continued) All Measurements taken at 26dB closed loop gain, 1-kHz audio, T A= 25°C unless otherwise noted. Measurements were made with AES17 filter using the TPA3136D2 EVM, which is available at ti.com. 100 0 90 -10 Ch 2 to Ch1 Ch 1 to Ch2 -20 80 -30 Crosstalk (dB) Efficiency (%) 70 60 50 40 30 -40 -50 -60 -70 -80 -90 20 PVcc = 6V PVcc = 13V PVcc = 14.4V 10 -100 -110 -120 20 0 0 2.5 5 7.5 10 12.5 15 17.5 Output Power (W) 20 22.5 25 50 AVCC=PVCC= 6 V, 13 V, 14.4 V, Load = 8 Ω + 66 µH Figure 9. Efficiency vs Output Power (BTL) -20 -30 THD + N (%) PVcc PSRR (dB) 500 1k 2k Frequency (Hz) 5k 10k 20k D010 Figure 10. Crosstalk vs Frequency (BTL) 10 5 -10 -40 -50 -60 1W 2.5 W 5W 2 1 0.5 0.2 0.1 0.05 0.02 0.01 0.005 -70 -80 -90 50 100 200 500 1k 2k Frequency (Hz) 5k 10k 0.002 0.001 20 20k 50 100 D011 AVCC=PVCC = 12 V, Load = 4 Ω + 33 µH 200 500 1k 2k Frequency (Hz) 5k 10k 20k D012 AVCC=PVCC = 13 V, Load = 4 Ω + 33 µH, 1 W, 2.5 W, 5 W Figure 11. Supply Ripple Rejection Ratio vs Frequency (BTL) Figure 12. Total Harmonic Distortion + Noise vs Frequency (PBTL) 32 10 20 Hz 1 kHz 28 Power @ 10% THD + N (W) THD + N (%) 200 AVCC=PVCC = 12 V, 1 W, Load = 6 Ω + 47 µH 0 -100 20 100 D009 1 0.1 24 20 16 12 8 4 0.01 10m 20m 0 50m 100m200m 500m 1 2 Output Power (W) 5 10 20 4 5 D013 AVCC=PVCC = 13 V, Load = 4 Ω + 33 µH, 20 Hz, 1 kHz Figure 13. Total Harmonic Distortion + Noise vs Output Power (PBTL) 6 7 8 9 10 11 Supply Voltage (V) 12 13 14 15 D014 AVCC=PVCC = 4.5 V to 14.4 V, Load = 4 Ω + 33 µH Figure 14. Output Power vs Supply Voltage (PBTL) Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated Product Folder Links: TPA3136D2 9 TPA3136D2 SLOS938B – MAY 2016 – REVISED JUNE 2016 www.ti.com Typical Characteristics (continued) All Measurements taken at 26dB closed loop gain, 1-kHz audio, T A= 25°C unless otherwise noted. Measurements were made with AES17 filter using the TPA3136D2 EVM, which is available at ti.com. 100 90 80 Efficiency (%) 70 60 50 40 30 20 PVcc = 6V PVcc = 13V PVcc = 14.4V 10 0 0 2.5 5 7.5 10 12.5 15 17.5 Total Output Power (W) 20 22.5 25 D015 AVCC=PVCC = 6 V, 13 V, 14.4 V, Load = 4 Ω + 33 µH Figure 15. Efficiency vs Output Power (PBTL) 8 Parameter Measurement Information All parameters are measured according to the conditions described in the Specifications . Most audio analyzers will not give correct readings of Class-D amplifiers’ performance due to their sensitivity to out of band noise present at the amplifier output. An AES-17 pre analyzer filter is recommended to use for ClassD amplifier measurements. In absence of such filter, a 30-kHz low-pass filter (10 Ω + 47 nF) can be used to reduce the out of band noise remaining on the amplifier outputs. 10 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated Product Folder Links: TPA3136D2 TPA3136D2 www.ti.com SLOS938B – MAY 2016 – REVISED JUNE 2016 9 Detailed Description 9.1 Overview To facilitate system design, the TPA3136D2 needs only a single power supply between 4.5 V and 14.4 V for operation. An internal voltage regulator provides suitable voltage levels for the gate driver, digital, and lowvoltage analog circuitry. Additionally, all circuitry requiring a floating voltage supply, as in the high-side gate drive, is accommodated by built-in bootstrap circuitry with integrated boot strap diodes requiring only an external capacitor for each half-bridge. The audio signal path, including the gate drive and output stage, is designed as identical, independent fullbridges. All decoupling capacitors should be placed as close to their associated pins as possible. In general, the physical loop with the power supply pins, decoupling capacitors and GND return path to the device pins must be kept as short as possible and with as little area as possible to minimize induction (see reference board documentation for additional information). For a properly functioning bootstrap circuit, a small ceramic capacitor must be connected from each bootstrap pin (BSXX) to the power-stage output pin (OUTXX). When the power-stage output is low, the bootstrap capacitor is charged through an internal diode connected between the gate-drive power-supply pin (GVDD) and the bootstrap pins. When the power-stage output is high, the bootstrap capacitor potential is shifted above the output potential and thus provides a suitable voltage supply for the high-side gate driver. In an application with PWM switching frequencies in the range of 315 kHz, use ceramic capacitors with at least 220-nF capacitance, size 0603 or 0805, for the bootstrap supply. These capacitors ensure sufficient energy storage, even during clipped low frequency audio signals, to keep the high-side power stage FET (LDMOS) fully turned on during the remaining part of its ON cycle. Special attention should be paid to the power-stage power supply; this includes component selection, PCB placement, and routing. For optimal electrical performance, EMI compliance, and system reliability, each PVCC pin should be decoupled with ceramic capacitors that are placed as close as possible to each supply pin. It is recommended to follow the PCB layout of the TPA3136D2 reference design. For additional information on recommended power supply and required components, see the application diagrams in this data sheet. The PVCC power supply should have low output impedance and low noise. The power-supply ramp and SD release sequence is not critical for device reliability as facilitated by the internal power-on-reset circuit, but it is recommended to release SD after the power supply is settled for minimum turn on audible artifacts. Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated Product Folder Links: TPA3136D2 11 TPA3136D2 SLOS938B – MAY 2016 – REVISED JUNE 2016 www.ti.com 9.2 Functional Block Diagram GVDD PVCC BSPL PVCC PBTL Select OUTPL FB Gate Drive OUTPL OUTPL FB LINP GND PWM Logic PLIMIT GVDD LINN PVCC BSNL PVCC OUTNL FB OUTNL FB FAULT Gate Drive OUTNL SD TTL Buffer SC Detect GND Spread Spectrum Control Ramp Generator Biases and References Startup Protection Logic DC Detect Thermal Detect UVLO/OVLO LIMITER Reference PLIMIT GVDD AVCC PVCC BSNR AVDD PVCC LDO Regulator GVDD Gate Drive GVDD OUTNR OUTNR FB OUTNR FB RINN PLIMIT GND PWM Logic GVDD RINP PVCC BSPR PVCC OUTNR FB Gate Drive OUTPR PBTL Select PBTL OUTPR FB PBTL Control GND 9.3 Feature Description 9.3.1 Fixed Analog Gain The analog gain of the TPA3136D2 is fixed to 26 dB. 9.3.2 SD Operation The TPA3136D2 device employs a shutdown mode of operation designed to reduce supply current (ICC) to the absolute minimum level during periods of nonuse for power conservation. The SD input pin should be held high (see specification table for trip point) during normal operation when the amplifier is in use. Pulling SD low causes the outputs to mute and the amplifier to enter a low-current state. Never leave SD unconnected, because amplifier operation would be unpredictable. For the best power-off pop performance, place the amplifier in the shutdown mode prior to removing the power supply voltage. 12 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated Product Folder Links: TPA3136D2 TPA3136D2 www.ti.com SLOS938B – MAY 2016 – REVISED JUNE 2016 Feature Description (continued) 9.3.3 PLIMIT The PLIMIT operation will, if selected, limit the output voltage level to a voltage level below the supply rail. In this case the amplifier operates as if it was powered by a lower supply voltage, and thereby limiting the output power by voltage clipping. PLIMIT threshold is set by the PLIMIT pin voltage. Figure 16. PLIMIT Circuit Operation 9.3.4 Spread Spectrum and De-Phase Control The TPA3136D2 device has built-in spread spectrum control of the oscillator frequency and de-phase of the PWM outputs to improve EMI performance. The spread spectrum schemes is internally fixed is always turned on. De-phase inverts the phase of the output PWM such that the idle output PWM waveforms of the two audio channels are inverted. De-phase does not affect the audio signal, or its polarity. 9.3.5 GVDD Supply The GVDD Supply is used to power the gates of the output full bridge transistors. Add a 1-μF capacitor to ground at this pin. 9.3.6 DC Detect The TPA3136D2 device has circuitry which will protect the speakers from DC current which might occur due to defective capacitors on the input or shorts on the printed circuit board at the inputs. A DC detect fault will be reported on the FAULT pin as a low state. The DC Detect fault will also cause the amplifier to shutdown by changing the state of the outputs to Hi-Z. A DC Detect Fault is issued when the output differential duty-cycle of either channel exceeds 14% (for example, +57%, –43%) for more than 950 msec at the same polarity. This feature protects the speaker from large DC currents or AC currents less than 2 Hz. To avoid nuisance faults due to the DC detect circuit, hold the SD pin low at power-up until the signals at the inputs are stable. Also, take care to match the impedance seen at the positive and negative inputs to avoid nuisance DC detect faults. The minimum differential input voltage required to trigger the DC detect is 130 mV. The inputs must remain at or above the voltage listed in the table for more than 950 msec to trigger the DC detect. 9.3.7 PBTL Select The TPA3136D2 device offers the feature of parallel BTL operation with two outputs of each channel connected directly. If the PBTL (pin 14) is tied high, the positive and negative outputs of each channel (left and right) are synchronized and in phase. To operate in this PBTL (mono) mode, tie PBTL pin to VCC and apply the input signal to the RINP and RINN inputs and place the speaker between the LEFT and RIGHT outputs with OUTPL connected to OUTNL and OUTPR connected to OUTNR to parallel the output half bridges for highest power efficiency. For an example of the PBTL connection, see the schematic in the Typical Applications section. Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated Product Folder Links: TPA3136D2 13 TPA3136D2 SLOS938B – MAY 2016 – REVISED JUNE 2016 www.ti.com Feature Description (continued) 9.3.8 Short-Circuit Protection and Automatic Recovery Feature The TPA3136D2 device has protection from overcurrent conditions caused by a short circuit on the output stage. The short circuit protection fault is reported on the FAULT pin as a low state. The amplifier outputs are switched to a Hi-Z state when the short circuit protection latch is engaged. The latch can be cleared by cycling the SD pin through the low state. If automatic recovery from the short circuit protection latch is desired, connect the FAULT pin directly to the SD pin. This allows the FAULT pin function to automatically drive the SD pin low which clears the short-circuit protection latch. 9.3.9 Thermal Protection Thermal protection on the TPA3136D2 device prevents damage to the device when the internal die temperature exceeds 150°C. There is a ±15°C tolerance on this trip point from device to device. Once the die temperature exceeds the thermal trip point, the device enters into the shutdown state and the outputs are disabled. This is a latched fault. Thermal protection faults are reported on the FAULT pin. If automatic recovery from the thermal protection latch is desired, connect the FAULT pin directly to the SD pin. This allows the FAULT pin function to automatically drive the SD pin low which clears the thermal protection latch. 14 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated Product Folder Links: TPA3136D2 TPA3136D2 www.ti.com SLOS938B – MAY 2016 – REVISED JUNE 2016 9.4 Device Functional Modes The TPA3136D2 device is running in BD-modulation. This is a modulation scheme that allows operation without the classic LC reconstruction filter when the amp is driving an inductive load with short speaker wires. Each output is switching from 0 volts to the supply voltage. The OUTPx and OUTNx are in phase with each other with no input so that there is little or no current in the speaker. The duty cycle of OUTPx is greater than 50% and OUTNx is less than 50% for positive output voltages. The duty cycle of OUTPx is less than 50% and OUTNx is greater than 50% for negative output voltages. The voltage across the load sits at 0 V throughout most of the switching period, reducing the switching current, which reduces any I2R losses in the load. OUTP OUTN No Output OUTP- OUTN 0V Speaker Current OUTP OUTN Positive Output PVCC OUTP-OUTN 0V Speaker Current 0A OUTP Negative Output OUTN OUTP - OUTN 0V - PVCC Speaker Current 0A Figure 17. BD Mode Modulation Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated Product Folder Links: TPA3136D2 15 TPA3136D2 SLOS938B – MAY 2016 – REVISED JUNE 2016 www.ti.com 10 Application and Implementation NOTE Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality. 10.1 Application Information The TPA3136D2 device is designed for use in inductor free applications with limited distance wire length) between amplifier and speakers like in TV sets, sound docks and Bluetooth speakers. The TPA3136D2 device can either be configured in stereo or mono mode, depending on output power conditions. Depending on output power requirements and necessity for (speaker) load protection, the built in PLIMIT circuit can be used to control system power, see functional description of these features. 10.2 Typical Applications PVCC 1nF 100nF 100µF GND FB 10k / SHUTDOWN IN_LEFT /SD /FAULT 1µF 1µF GND 1 28 PVCC 27 BSPL 26 2 LINP 3 LINN 4 NC 5 56k 1µF 6 AVCC 7 GND GVDD 8 9 BSNL TPA3136D2 PLIMIT GND 1µF 10 RINN 11 RINP IN_RIGHT 1µF NC PBTL GND 1nF 220nF OUTPL 25 GND 24 OUTNL 23 NC 1µF 39k PVCC 12 13 14 22 BSNR 21 20 19 18 17 16 15 OUTNR GND GND GND 1nF FB 220nF 220nF FB GND OUTPR 1nF BSPR PVCC 220nF GND PVCC 1nF FB GND 10R PVCC 1nF 100nF 100µF GND Figure 18. Stereo Class-D Amplifier with BTL Output and Single-Ended Inputs with Spread Spectrum Modulation 16 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated Product Folder Links: TPA3136D2 TPA3136D2 www.ti.com SLOS938B – MAY 2016 – REVISED JUNE 2016 Typical Applications (continued) PVCC 1nF 10k /SD / SHUTDOWN /FAULT PVCC 1 2 LINP 3 4 NC 5 GND NC AVCC 1µF 39k 56k 1µF GND 8 GVDD 9 PLIMIT GND 1µF IN 1µF GND 6 7 TPA3136D2 10 RINN 11 RINP 12 NC 13 PBTL 14 25 24 23 22 21 20 19 18 17 16 15 100µF GND 28 PVCC 27 BSPL 26 LINN 100nF 470nF OUTPL FB GND GND OUTNL BSNL 1nF BSNR OUTNR GND GND GND 1nF OUTPR FB BSPR PVCC 470nF PVCC 10R PVCC 1nF 100nF 100µF GND Figure 19. Stereo Class-D Amplifier with PBTL Output and Single-Ended Input with Spread Spectrum Modulation 10.2.1 Design Requirements 10.2.1.1 PCB Material Recommendation FR-4 Glass Epoxy material with 1 oz. (35 µm) is recommended for use with the TPA3136D2. The use of this material can provide for higher power output, improved thermal performance, and better EMI margin (due to lower PCB trace inductance). It is recommended to use several GND underneath the device thermal pad for thermal coupling to a bottom side copper GND plane for best thermal performance. 10.2.1.2 PVCC Capacitor Recommendation The large capacitors used in conjunction with each full-bridge, are referred to as the PVCC Capacitors. These capacitors should be selected for proper voltage margin and adequate capacitance to support the power requirements. In practice, with a well designed system power supply, 100 μF, 16 V will support most applications with 12-V power supply. 25-V capacitor rating is recommended for power supply voltage higher than 12 V. For The PVCC capacitors should be low ESR type because they are used in a circuit associated with high-speed switching. 10.2.1.3 Decoupling Capacitor Recommendations In order to design an amplifier that has robust performance, passes regulatory requirements, and exhibits good audio performance, good quality decoupling capacitors should be used. In practice, X7R should be used in this application. The voltage of the decoupling capacitors should be selected in accordance with good design practices. Temperature, ripple current, and voltage overshoot must be considered. This fact is particularly true in the selection of the ceramic capacitors that are placed on the power supply to each full-bridge. They must withstand the voltage overshoot of the PWM switching, the heat generated by the amplifier during high power output, and the ripple current created by high power output. A minimum voltage rating of 16 V is required for use with a 12-V power supply. Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated Product Folder Links: TPA3136D2 17 TPA3136D2 SLOS938B – MAY 2016 – REVISED JUNE 2016 www.ti.com Typical Applications (continued) 10.2.2 Detailed Design Procedure A rising-edge transition on SD input allows the device to start switching. It is recommended to ramp the PVCC voltage to its desired value before releasing SD for minimum audible artifacts. The device is non-inverting the audio signal from input to output. The GVDD pin is not recommended to be used as a voltage source for external circuitry. 10.2.2.1 Ferrite Bead Filter Considerations Using the Advanced Emissions Suppression Technology in the TPA3136D2 amplifier it is possible to design a high efficiency Class-D audio amplifier while minimizing interference to surrounding circuits. It is also possible to accomplish this with only a low-cost ferrite bead filter. In this case it is necessary to carefully select the ferrite bead used in the filter. One important aspect of the ferrite bead selection is the type of material used in the ferrite bead. Not all ferrite material is alike, so it is important to select a material that is effective in the 10 to 100 MHz range which is key to the operation of the Class-D amplifier. Many of the specifications regulating consumer electronics have emissions limits as low as 30 MHz. It is important to use the ferrite bead filter to block radiation in the 30-MHz and above range from appearing on the speaker wires and the power supply lines which are good antennas for these signals. The impedance of the ferrite bead can be used along with a small capacitor with a value in the range of 1000 pF to reduce the frequency spectrum of the signal to an acceptable level. For best performance, the resonant frequency of the ferrite bead/ capacitor filter should be less than 10 MHz. Also, it is important that the ferrite bead is large enough to maintain its impedance at the peak currents expected for the amplifier. Some ferrite bead manufacturers specify the bead impedance at a variety of current levels. In this case it is possible to make sure the ferrite bead maintains an adequate amount of impedance at the peak current the amplifier will see. If these specifications are not available, it is also possible to estimate the bead's current handling capability by measuring the resonant frequency of the filter output at low power and at maximum power. A change of resonant frequency of less than fifty percent under this condition is desirable. Examples of ferrite beads which have been tested and work well with the TPA3136D2 device include NFZ2MSM series from Murata. A high quality ceramic capacitor is also needed for the ferrite bead filter. A low ESR capacitor with good temperature and voltage characteristics will work best. Additional EMC improvements may be obtained by adding snubber networks from each of the class-D outputs to ground. Suggested values for a simple RC series snubber network would be 68 Ω in series with a 100-pF capacitor although design of the snubber network is specific to every application and must be designed taking into account the parasitic reactance of the printed circuit board as well as the audio amp. Take care to evaluate the stress on the component in the snubber network especially if the amp is running at high PVCC. Also, make sure the layout of the snubber network is tight and returns directly to the GND or the thermal pad beneath the chip. 10.2.2.2 Efficiency: LC Filter Required with the Traditional Class-D Modulation Scheme The main reason that the traditional class-D amplifier needs an output filter is that the switching waveform results in maximum current flow. This causes more loss in the load, which causes lower efficiency. The ripple current is large for the traditional modulation scheme, because the ripple current is proportional to voltage multiplied by the time at that voltage. The differential voltage swing is 2 × VCC, and the time at each voltage is half the period for the traditional modulation scheme. An ideal LC filter is needed to store the ripple current from each half cycle for the next half cycle, while any resistance causes power dissipation. The speaker is both resistive and reactive, whereas an LC filter is almost purely reactive. The TPA3136D2 modulation scheme has little loss in the load without a filter because the pulses are short and the change in voltage is VCC instead of 2 × VCC. As the output power increases, the pulses widen, making the ripple current larger. Ripple current could be filtered with an LC filter for increased efficiency, but for most applications the filter is not needed. An LC filter with a cutoff frequency less than the class-D switching frequency allows the switching current to flow through the filter instead of the load. The filter has less resistance but higher impedance at the switching frequency than the speaker, which results in less power dissipation, therefore increasing efficiency. 18 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated Product Folder Links: TPA3136D2 TPA3136D2 www.ti.com SLOS938B – MAY 2016 – REVISED JUNE 2016 Typical Applications (continued) 10.2.2.3 When to Use an Output Filter for EMI Suppression The TPA3136D2 device has been tested with a simple ferrite bead filter for a variety of applications including long speaker wires up to 100 cm and high power. The TPA3136D2 EVM passes FCC Class B specifications under these conditions using twisted speaker wires. The size and type of ferrite bead can be selected to meet application requirements. Also, the filter capacitor can be increased if necessary with some impact on efficiency. There may be a few circuit instances where it is necessary to add a complete LC reconstruction filter. These circumstances might occur if there are nearby circuits which are sensitive to noise. In these cases a classic second order Butterworth filter similar to those shown in the figures below can be used. Some systems have little power supply decoupling from the AC line but are also subject to line conducted interference (LCI) regulations. These include systems powered by "wall warts" and "power bricks." In these cases, LC reconstruction filters can be the lowest cost means to pass LCI tests. Common mode chokes using low frequency ferrite material can also be effective at preventing line conducted interference. Ferrite Chip Bead OUTP 1 nF Ferrite Chip Bead OUTN 1 nF Figure 20. Typical Ferrite Chip Bead Filter (Chip Bead Example: NFZ2MSM series from Murata) 33 mH OUTP L1 C2 1 mF 33 mH OUTN L2 C3 1 mF Figure 21. Typical LC Output Filter, Cutoff Frequency of 27 kHz, Speaker Impedance = 8 Ω 15 mH OUTP L1 C2 2.2 mF 15 mH OUTN L2 C3 2.2 mF Figure 22. Typical LC Output Filter, Cutoff Frequency of 27 kHz, Speaker Impedance = 6 Ω 10.2.2.4 Input Resistance The typical input resistance of the amplifier is fixed to 30 kΩ ±20%. Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated Product Folder Links: TPA3136D2 19 TPA3136D2 SLOS938B – MAY 2016 – REVISED JUNE 2016 www.ti.com Typical Applications (continued) Zf Ci IN Input Signal Zi 10.2.2.5 Input Capacitor, Ci In the typical application, an input capacitor (Ci) is required to allow the amplifier to bias the input signal to the proper dc level for optimum operation. In this case, Ci and the input impedance of the amplifier (Zi) form a highpass filter with the corner frequency determined in Equation 1. -3 dB fc = 1 2p Zi Ci fc (1) The value of Ci is important, as it directly affects the bass (low-frequency) performance of the circuit. Consider the example where Zi is 30 kΩ and the specification calls for a flat bass response down to 20 Hz. Equation 1 is reconfigured as Equation 2. Ci = 1 2p Zi fc (2) In this example, Ci is 0.27 µF; so, one would likely choose a value of 0.33 μF as this value is commonly used. A further consideration for this capacitor is the leakage path from the input source through the input network (Ci) and the feedback network to the load. This leakage current creates a dc offset voltage at the input to the amplifier that reduces useful headroom. For this reason, a low-leakage tantalum or ceramic capacitor is the best choice. When polarized capacitors are used, the positive side of the capacitor should face the amplifier input in most applications as the dc level there is held at 3 V, which is likely higher than the source dc level. Note that it is important to confirm the capacitor polarity in the application. Additionally, lead-free solder can create dc offset voltages and it is important to ensure that boards are cleaned properly. 10.2.2.6 BSN and BSP Capacitors The full H-bridge output stages use only NMOS transistors. Therefore, they require bootstrap capacitors for the high side of each output to turn on correctly. A 0.22-μF ceramic capacitor, rated for at least 25 V, must be connected from each output to its corresponding bootstrap input. Specifically, one 0.22-μF capacitor must be connected from OUTPx to BSPx, and one 0.22-μF capacitor must be connected from OUTNx to BSNx. (See the application circuit diagram in Figure 18.) The bootstrap capacitors connected between the BSxx pins and corresponding output function as a floating power supply for the high-side N-channel power MOSFET gate drive circuitry. During each high-side switching cycle, the bootstrap capacitors hold the gate-to-source voltage high enough to keep the high-side MOSFETs turned on. 20 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated Product Folder Links: TPA3136D2 TPA3136D2 www.ti.com SLOS938B – MAY 2016 – REVISED JUNE 2016 Typical Applications (continued) 10.2.2.7 Differential Inputs The differential input stage of the amplifier cancels any noise that appears on both input lines of the channel. To use the TPA3136D2 device with a differential source, connect the positive lead of the audio source to the INP input and the negative lead from the audio source to the INN input. To use the TPA3136D2 with a single-ended source, ac ground the INP or INN input through a capacitor equal in value to the input capacitor on INN or INP and apply the audio source to either input. In a single-ended input application, the unused input should be ac grounded at the audio source instead of at the device input for best noise performance. For good transient performance, the impedance seen at each of the two differential inputs should be the same. The impedance seen at the inputs should be limited to an RC time constant of 1 ms or less if possible. This is to allow the input dc blocking capacitors to become completely charged during the 14-ms power-up time. If the input capacitors are not allowed to completely charge, there will be some additional sensitivity to component matching which can result in pop if the input components are not well matched. 10.2.2.8 Using Low-ESR Capacitors Low-ESR capacitors are recommended throughout this application section. A real (as opposed to ideal) capacitor can be modeled simply as a resistor in series with an ideal capacitor. The voltage drop across this resistor minimizes the beneficial effects of the capacitor in the circuit. The lower the equivalent value of this resistance, the more the real capacitor behaves like an ideal capacitor. Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated Product Folder Links: TPA3136D2 21 TPA3136D2 SLOS938B – MAY 2016 – REVISED JUNE 2016 www.ti.com Typical Applications (continued) 10.2.3 Application Performance Curves 10.2.3.1 EN55013 Radiated Emissions Results TPA3136D2 EVM, PVCC = 12 V, 8-Ω speakers, PO = 4 W Figure 23. Radiated Emission - Horizontal Figure 24. Radiated Emission - Vertical 10.2.3.2 EN55022 Conducted Emissions Results TPA3136D2 EVM, PVCC = 12 V, 8-Ω speakers, PO = 4 W EN55022 Class B EN55022 Class B 80 80 QP readings QP limit 60 50 40 30 20 0.15 60 50 40 30 0.3 0.5 1 2 3 5 Frequency (MHz) 10 Figure 25. Conducted Emission - Line 22 70 Level (dBPV) Level (dBPV) 70 QP readings QP limit 20 30 20 0.15 0.3 0.5 1 2 3 5 Frequency (MHz) 10 20 30 Figure 26. Conducted Emission - Neutral Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated Product Folder Links: TPA3136D2 TPA3136D2 www.ti.com SLOS938B – MAY 2016 – REVISED JUNE 2016 11 Power Supply Recommendations 11.1 Power Supply Decoupling, CS The TPA3136D2 device is a high-performance CMOS audio amplifier that requires adequate power supply decoupling to ensure that the output total harmonic distortion (THD) is as low as possible. Power supply decoupling also prevents oscillations for long lead lengths between the amplifier and the speaker. Optimum decoupling is achieved by using a network of capacitors of different types that target specific types of noise on the power supply leads. For higher frequency transients due to parasitic circuit elements such as bond wire and copper trace inductances as well as lead frame capacitance, a good quality low equivalent-series-resistance (ESR) ceramic capacitor of value between 220 pF and 1000 pF works well. This capacitor should be placed as close to the device PVCC pins and system ground (either GND pins or thermal pad) as possible. For midfrequency noise due to filter resonances or PWM switching transients as well as digital hash on the line, another good quality capacitor typically 0.1 μF to 1 µF placed as close as possible to the device PVCC leads works best. For filtering lower frequency noise signals, a larger aluminum electrolytic capacitor of 100 μF or greater placed near the audio power amplifier is recommended. The 100-μF capacitor also serves as a local storage capacitor for supplying current during large signal transients on the amplifier outputs. The PVCC pins provide the power to the output transistors, so a 100-µF or larger capacitor should be placed on each PVCC pin. A 1-µF capacitor on the AVCC pin is adequate. Also, a small decoupling resistor between AVCC and PVCC can be used to keep high frequency class-D noise from entering the linear input amplifiers. Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated Product Folder Links: TPA3136D2 23 TPA3136D2 SLOS938B – MAY 2016 – REVISED JUNE 2016 www.ti.com 12 Layout 12.1 Layout Guidelines The TPA3136D2 device can be used with a small, inexpensive ferrite bead output filter for most applications. However, since the Class-D switching edges are fast, it is necessary to take care when planning the layout of the printed circuit board. The following suggestions will help to meet EMC requirements. • Decoupling capacitors—The high-frequency decoupling capacitors should be placed as close to the PVCC and AVCC pins as possible. Large (100-µF or greater) bulk power supply decoupling capacitors should be placed near the TPA3136D2 device on the PVCC supplies. Local, high-frequency bypass capacitors should be placed as close to the PVCC pins as possible. These caps can be connected to the thermal pad directly for an excellent ground connection. Consider adding a small, good quality low ESR ceramic capacitor between 220 pF and 1000 pF and a larger mid-frequency cap of value between 0.1 μF and 1 μF also of good quality to the PVCC connections at each end of the chip. • Keep the current loop from each of the outputs through the ferrite bead and the small filter cap and back to GND as small and tight as possible. The size of this current loop determines its effectiveness as an antenna. • Grounding—The AVCC (pin 14) decoupling capacitor should be connected to ground (GND). The PVCC decoupling capacitors should connect to GND. Analog ground and power ground should be connected at the thermal pad, which should be used as a central ground connection or star ground for the TPA3136D2. • Output filter—The ferrite EMI filter (Figure 20) should be placed as close to the output pins as possible for the best EMI performance. The capacitors used in the ferrite should be grounded to power ground. • Thermal Pad—The thermal pad must be soldered to the PCB for proper thermal performance and optimal reliability. The dimensions of the thermal pad and thermal land should be 6.46 mm × 2.35 mm. Six rows of solid vias (three vias per row, 0.3302 mm or 13 mils diameter) should be equally spaced underneath the thermal land. The vias should connect to a solid copper plane, either on an internal layer or on the bottom layer of the PCB. The vias must be solid vias, not thermal relief or webbed vias. See the TI Application Report SLMA002 for more information about using the TSSOP thermal pad. For recommended PCB footprints, see figures at the end of this data sheet. For an example layout, see the TPA3136D2 Evaluation Module (TPA3136D2EVM) User Manual. Both the EVM user manual and the thermal pad application report are available on the TI Web site at http://www.ti.com. 24 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated Product Folder Links: TPA3136D2 TPA3136D2 www.ti.com SLOS938B – MAY 2016 – REVISED JUNE 2016 12.2 Layout Example 100PF 100nF 1 28 2 27 3 26 4 25 5 24 6 23 7 22 8 2118 9 20 10 19 11 18 12 17 13 16 14 15 FB 1nF 1nF 0.22PF 1nF FB 0.22PF 1PF 1PF 0.22PF FB 1nF 0.22PF 1nF 1nF FB 100nF 100PF Top Layer Ground and Thermal Pad Via to Bottom Ground Plane Pad to Top Layer Ground Pour Top Layer Signal Traces Figure 27. BTL Layout Example Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated Product Folder Links: TPA3136D2 25 TPA3136D2 SLOS938B – MAY 2016 – REVISED JUNE 2016 www.ti.com 13 Device and Documentation Support 13.1 Device Support 13.1.1 Third-Party Products Disclaimer TI'S PUBLICATION OF INFORMATION REGARDING THIRD-PARTY PRODUCTS OR SERVICES DOES NOT CONSTITUTE AN ENDORSEMENT REGARDING THE SUITABILITY OF SUCH PRODUCTS OR SERVICES OR A WARRANTY, REPRESENTATION OR ENDORSEMENT OF SUCH PRODUCTS OR SERVICES, EITHER ALONE OR IN COMBINATION WITH ANY TI PRODUCT OR SERVICE. 13.2 Documentation Support 13.2.1 Related Documentation PowerPAD™ Thermally Enhanced Package Application Report (SLMA002) 13.3 Community Resources The following links connect to TI community resources. Linked contents are provided "AS IS" by the respective contributors. They do not constitute TI specifications and do not necessarily reflect TI's views; see TI's Terms of Use. TI E2E™ Online Community TI's Engineer-to-Engineer (E2E) Community. Created to foster collaboration among engineers. At e2e.ti.com, you can ask questions, share knowledge, explore ideas and help solve problems with fellow engineers. Design Support TI's Design Support Quickly find helpful E2E forums along with design support tools and contact information for technical support. 13.4 Trademarks SpeakerGuard, E2E are trademarks of Texas Instruments. All other trademarks are the property of their respective owners. 13.5 Electrostatic Discharge Caution These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. 13.6 Glossary SLYZ022 — TI Glossary. This glossary lists and explains terms, acronyms, and definitions. 26 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated Product Folder Links: TPA3136D2 TPA3136D2 www.ti.com SLOS938B – MAY 2016 – REVISED JUNE 2016 14 Mechanical, Packaging, and Orderable Information The following pages include mechanical, packaging, and orderable information. This information is the most current data available for the designated devices. This data is subject to change without notice and revision of this document. For browser-based versions of this data sheet, refer to the left-hand navigation. Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated Product Folder Links: TPA3136D2 27 PACKAGE OPTION ADDENDUM www.ti.com 30-Jun-2016 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan Lead/Ball Finish MSL Peak Temp (2) (6) (3) Op Temp (°C) Device Marking (4/5) TPA3136D2PWP ACTIVE HTSSOP PWP 28 50 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HR -40 to 85 TPA3136D2 TPA3136D2PWPR ACTIVE HTSSOP PWP 28 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HR -40 to 85 TPA3136D2 (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. (4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. (5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Device Marking for that device. (6) Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish value exceeds the maximum column width. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. Addendum-Page 1 Samples PACKAGE OPTION ADDENDUM www.ti.com 30-Jun-2016 In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis. Addendum-Page 2 PACKAGE MATERIALS INFORMATION www.ti.com 25-Jun-2016 TAPE AND REEL INFORMATION *All dimensions are nominal Device TPA3136D2PWPR Package Package Pins Type Drawing SPQ HTSSOP 2000 PWP 28 Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) 330.0 16.4 Pack Materials-Page 1 6.9 B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 10.2 1.8 12.0 16.0 Q1 PACKAGE MATERIALS INFORMATION www.ti.com 25-Jun-2016 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TPA3136D2PWPR HTSSOP PWP 28 2000 367.0 367.0 38.0 Pack Materials-Page 2 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. 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